240 Series Spherical Roller Bearings

The 240 Series Spherical Roller Bearings are designed as ultra-thin, extra-wide double-row spherical roller bearings, engineered for large-diameter hollow shafts and heavy-duty rotating equipment requiring both compact radial installation space and extremely high load-carrying capacity.

Featuring oversized bore diameters, slim outer rings, and an extended roller profile, the 240 series delivers exceptional radial load resistance while maintaining a reduced radial cross-section. Compared with the 230 series, the 240 series provides significantly higher load capacity while still preserving a compact and space-efficient design.

The self-aligning spherical raceway structure enables automatic compensation for shaft deflection and mounting misalignment, ensuring stable performance and reduced wear under continuous low-speed heavy-load operation.

BY Bearings offers multiple configuration options for the 240 series, including CC stamped steel cages, E optimized internal design, and CA/MB machined solid brass cages, as well as different clearance grades and lubrication structures to meet demanding industrial environments.

Bearing Designation Example

24080 CAK30/W33

• 240 – Series code

• 2: Double-row spherical roller bearing

• 40: Ultra-thin, extra-wide large-bore design series

• 80 – Bore code

• Corresponds to a bore diameter of 400 mm

• K30 – Tapered bore (1:30 taper ratio) for heavy-duty adapter sleeve mounting

• CA – Machined solid brass cage

• W33 – Outer ring lubrication groove with oil holes for centralized relubrication

Features and Benefits

• Ultra-Thin Outer Ring Design

  The slim outer ring construction makes the 240 series ideal for machinery with limited radial installation space, enabling compact yet high-performance bearing solutions.

• Extremely High Load-Carrying Capacity

  The extra-wide double-row roller arrangement provides outstanding radial load capacity and supports moderate axial loads in both directions, even under severe operating conditions.

• Excellent Self-Aligning Performance

  The spherical raceway design effectively compensates for shaft deflection, mounting errors, and housing misalignment, ensuring smooth and stable operation in large-scale equipment.

• Optimized for Hollow Shaft Systems

  The oversized bore design allows direct integration with large hollow shafts, simplifying structural design and improving overall system efficiency.

• Lightweight Yet Durable Construction

  Compared with conventional heavy-section spherical roller bearings, the 240 series reduces overall bearing mass while maintaining high strength and fatigue resistance through advanced heat-treated bearing steel.

• Flexible Installation and Maintenance

  K30 tapered bore options enable quick mounting and dismounting using adapter sleeves, improving maintenance efficiency in large industrial systems.

• Multiple Configuration Options

  Available in CC, E, CA, and MB cage designs with optional C3/C4 clearance and W33 lubrication features, suitable for harsh working environments such as high temperature, dust, and continuous heavy load conditions.

Typical Applications

The 240 Series Spherical Roller Bearings are widely used in large-scale industrial and heavy-duty rotating machinery, including:

• Large paper machine dryer cylinders

• Aluminum casting and rolling equipment

• Heavy-duty rotary drying drums

• Industrial film stretching rollers

• Metallurgical processing equipment

• Marine propulsion and transmission shafts

• Large rotary kiln and furnace systems

• Heavy-duty turntable and support systems

• Bulk material processing machinery

Technical Advantages

• Double-row spherical roller structure with extra-wide roller design

• Ultra-thin outer ring for space-saving installation

• Very high radial load capacity with moderate axial load capability

• Superior self-aligning capability for misalignment compensation

• Compatible with large hollow shaft systems

• W33 lubrication groove for centralized relubrication

• Tapered bore (K30) for easy mounting and dismounting

• Multiple cage and clearance configurations available

• High durability for continuous low-speed heavy-load operation

The 240 Series Spherical Roller Bearings are a premium solution for extreme heavy-duty applications requiring maximum load capacity, compact radial design, and long-term operational reliability in harsh industrial environments.